Mechanical properties of collagen fascicles from the rabbit patellar tendon.
Mechanical properties of collagen fascicles from the rabbit patellar tendon.
复制标题
兔髌腱胶原束的机械特性。
DOI：
10.1115/1.2798033
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
N. Yamamoto
中科院分区：
文献类型：
--
作者：
E. Yamamoto;Kozaburo Hayashi;N. Yamamoto
使用新设计的微拉伸测试仪研究了从兔髌腱中获得的直径约 300 微米的胶原束的拉伸和粘弹性特性。它们的横截面积是通过视频尺寸分析仪结合 CCD 相机和低倍显微镜来确定的。从髌腱内侧到外侧六个位置获得的束的拉伸性能没有统计学上的显着差异。在约 1.5%/s 应变速率下测定的束的切线模量、拉伸强度和失效应变分别为 216 +/- 68 MPa、17.2 +/- 4.1 MPa 和 10.9 +/- 1.6%（平均值 +/- S.D.）。这些特性与大块髌腱的特性有很大不同。例如，这些束的拉伸强度和失效应变分别是大块肌腱的 42% 和 179%。在 1%/s 应变率下测定的胶原束的切线模量和拉伸强度比在 0.01%/s 应变率下测定的大 35%。失效时的应变与应变率无关。放松测试表明，300 秒时压力减少约 25%。胶原束的这些应力松弛行为和应变率效应与大肌腱的应力松弛行为和应变率效应有很大不同。束和体腱之间拉伸和粘弹性特性的差异可能归因于基质、束之间的机械相互作用以及胶原原纤维卷曲结构的差异。
Tensile and viscoelastic properties of collagen fascicles of approximately 300 microns in diameter, which were obtained from rabbit patellar tendons, were studied using a newly designed micro-tensile tester. Their cross-sectional areas were determined with a video dimension analyzer combined with a CCD camera and a low magnification microscope. There were no statistically significant differences in tensile properties among the fascicles obtained from six medial-to-lateral locations of the patellar tendon. Tangent modulus, tensile strength, and strain at failure of the fascicles determined at about 1.5 percent/s strain rate were 216 +/- 68 MPa, 17.2 +/- 4.1 MPa, and 10.9 +/- 1.6 percent (mean +/- S.D.), respectively. These properties were much different from those of bulk patellar tendons; for example, the tensile strength and strain at failure of these fascicles were 42 percent and 179 percent of those of bulk tendons, respectively. Tangent modulus and tensile strength of collagen fascicles determined at 1 percent/s strain rate were 35 percent larger than those at 0.01 percent/s. The strain at failure was independent of strain rate. Relaxation tests showed that the reduction of stress was approximately 25 percent at 300 seconds. These stress relaxation behavior and strain rate effects of collagen fascicles differed greatly from those of bulk tendons. The differences in tensile and viscoelastic properties between fascicles and bulk tendons may be attributable to ground substances, mechanical interaction between fascicles, and the difference of crimp structure of collagen fibrils.
影响因子：
2.4
作者：
BUTLER, DL;GROOD, ES;BRACKETT, K
通讯作者：
BRACKETT, K
DOI：
10.1115/1.3108414
发表时间：
1988-05-01
影响因子：
1.7
作者：
LEE, TQ;WOO, SLY
通讯作者：
WOO, SLY
影响因子：
2.4
作者：
BUTLER, DL;KAY, MD;STOUFFER, DC
通讯作者：
STOUFFER, DC